Bulls defense putting up impressive numbers

But Thibodeau says 'we've got a long way to go'

Ask Tom Thibodeau about the Bulls defense, which ranks at or near the top of most significant statistical categories, and invariably you will hear what the Bulls coach said again Monday night.

"We've got a long way to go," he said.

In reality, there's nowhere to go — at least statistically — in opponents' field-goal percentage. The Bulls entered Monday night ranked first, holding teams to 42.3 percent. They also ranked third in opponents' scoring (92.3 points), fourth in 3-point shooting and third in rebounding.

"One of the keys to me is Derrick Rose has become a better defender, in large part because he must be willing to listen and learn and because they're good teachers as well," Bucks coach Scott Skiles said. "It's a very good defensive team."

Skiles had Bulls assistant Ron Adams on his Bulls staffs and hired Bulls assistant Adrian Griffin in Milwaukee. He has also known Thibodeau for years. Adams drew widespread credit for reviving the Thunder's defense, his stop between Bulls stints.

'D' it up: Thibodeau did elaborate on some reasons for the Bulls' defensive success.

"We are doing a better job of getting back, getting set, keeping the ball out of the paint," he said. "We're challenging shots better. And I think we've developed more of a multiple effort personality. But we still need to work on that."

Thibodeau also credited veteran leadership.

"Derrick has done a much better job on the ball, and it starts on the ball," he said. "We have some veterans who have done a good job for a long time. Kurt Thomas, I've coached before, so I think being familiar with the system has helped. Keith Bogans,(Brian) Scalabrine, they help move the group forward.

"Luol (Deng) has been a terrific defender for a long time. Carlos (Boozer) has been one of the best rebounders in the league for a long time and that's a big part of defense."

Layups:James Johnson, who isn't in the rotation anyway, sprained his left knee over the weekend. He warmed up but then didn't dress. ... Joakim Noah gets the pin removed from his surgically repaired right thumb Tuesday.